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/*
libusb-sniff.c - Library for usb sniffing nokia's flasher-3.5
Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* compile: gcc libusb-sniff.c -o libusb-sniff.so -W -Wall -O2 -fPIC -ldl -shared -m32 */
/* usage: sudo USBSNIFF_WAIT=1 LD_PRELOAD=./libusb-sniff.so flasher-3.5 ... */
/* usage: sudo USBSNIFF_SKIP_READ=1 USBSNIFF_SKIP_WRITE=1 LD_PRELOAD=./libusb-sniff.so flasher-3.5 ... */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
struct usb_dev_handle;
typedef struct usb_dev_handle usb_dev_handle;
static char to_ascii(char c) {
if ( c >= 32 && c <= 126 )
return c;
return '.';
}
static void dump_bytes(const char * buf, size_t size) {
size_t i, ascii_cnt = 0;
char ascii[17] = { 0, };
for ( i = 0; i < size; i++ ) {
if ( i % 16 == 0 ) {
if ( i != 0 ) {
printf(" |%s|\n", ascii);
ascii[0] = 0;
ascii_cnt = 0;
}
printf("%04X:", (unsigned int)i);
}
printf(" %02X", buf[i] & 0xFF);
ascii[ascii_cnt] = to_ascii(buf[i]);
ascii[ascii_cnt + 1] = 0;
ascii_cnt++;
}
if ( ascii[0] ) {
if ( size % 16 )
for ( i = 0; i < 16 - (size % 16); i++ )
printf(" ");
printf(" |%s|\n", ascii);
}
}
int usb_bulk_write(usb_dev_handle * dev, int ep, const char * bytes, int size, int timeout) {
static int (*real_usb_bulk_write)(usb_dev_handle * dev, int ep, const char * bytes, int size, int timeout) = NULL;
if ( ! real_usb_bulk_write )
*(void **)(&real_usb_bulk_write) = dlsym(RTLD_NEXT, "usb_bulk_write");
if ( ! getenv("USBSNIFF_SKIP_WRITE") ) {
printf("\n==== usb_bulk_write (ep=%d size=%d timeout=%d) ====\n", ep, size, timeout);
dump_bytes(bytes, size);
printf("====\n");
if ( getenv("USBSNIFF_WAIT") ) {
printf("Press ENTER"); fflush(stdout); getchar();
}
}
return real_usb_bulk_write(dev, ep, bytes, size, timeout);
}
int usb_bulk_read(usb_dev_handle * dev, int ep, char * bytes, int size, int timeout) {
static int (*real_usb_bulk_read)(usb_dev_handle * dev, int ep, char * bytes, int size, int timeout) = NULL;
int ret;
if ( ! real_usb_bulk_read )
*(void **)(&real_usb_bulk_read) = dlsym(RTLD_NEXT, "usb_bulk_read");
ret = real_usb_bulk_read(dev, ep, bytes, size, timeout);
if ( ! getenv("USBSNIFF_SKIP_READ") ) {
printf("\n==== usb_bulk_read (ep=%d size=%d timeout=%d) ret = %d ====\n", ep, size, timeout, ret);
if ( ret > 0 ) {
dump_bytes(bytes, ret);
printf("====\n");
}
if ( getenv("USBSNIFF_WAIT") ) {
printf("Press ENTER"); fflush(stdout); getchar();
}
}
return ret;
}
int usb_control_msg(usb_dev_handle *dev, int requesttype, int request, int value, int index, char *bytes, int size, int timeout) {
static int (*real_usb_control_msg)(usb_dev_handle *dev, int requesttype, int request, int value, int index, char *bytes, int size, int timeout) = NULL;
int ret;
if ( ! real_usb_control_msg )
*(void **)(&real_usb_control_msg) = dlsym(RTLD_NEXT, "usb_control_msg");
if ( requesttype == 64 && ! getenv("USBSNIFF_SKIP_CONTROL") ) {
printf("\n==== usb_control_msg(requesttype=%d, request=%d, value=%d, index=%d, size=%d, timeout=%d) ====\n", requesttype, request, value, index, size, timeout);
dump_bytes(bytes, size);
printf("====\n");
if ( getenv("USBSNIFF_WAIT") ) {
printf("Press ENTER"); fflush(stdout); getchar();
}
}
ret = real_usb_control_msg(dev, requesttype, request, value, index, bytes, size, timeout);
if ( requesttype != 64 && ! getenv("USBSNIFF_SKIP_CONTROL") ) {
printf("\n==== usb_control_msg(requesttype=%d, request=%d, value=%d, index=%d, size=%d, timeout=%d) ret = %d ====\n", requesttype, request, value, index, size, timeout, ret);
if ( ret > 0 ) {
dump_bytes(bytes, ret);
printf("====\n");
}
if ( getenv("USBSNIFF_WAIT") ) {
printf("Press ENTER"); fflush(stdout); getchar();
}
}
return ret;
}
int usb_set_configuration(usb_dev_handle *dev, int configuration) {
static int (*real_usb_set_configuration)(usb_dev_handle *dev, int configuration) = NULL;
if ( ! real_usb_set_configuration )
*(void **)(&real_usb_set_configuration) = dlsym(RTLD_NEXT, "usb_set_configuration");
printf("\n==== usb_set_configuration (configuration=%d) ====\n", configuration);
return real_usb_set_configuration(dev, configuration);
}
int usb_claim_interface(usb_dev_handle *dev, int interface) {
static int (*real_usb_claim_interface)(usb_dev_handle *dev, int interface) = NULL;
if ( ! real_usb_claim_interface )
*(void **)(&real_usb_claim_interface) = dlsym(RTLD_NEXT, "usb_claim_interface");
printf("\n==== usb_claim_interface (interface=%d) ====\n", interface);
return real_usb_claim_interface(dev, interface);
}
int usb_set_altinterface(usb_dev_handle *dev, int alternate) {
static int (*real_usb_set_altinterface)(usb_dev_handle *dev, int alternate) = NULL;
if ( ! real_usb_set_altinterface )
*(void **)(&real_usb_set_altinterface) = dlsym(RTLD_NEXT, "usb_set_altinterface");
printf("\n==== usb_set_altinterface (alternate=%d) ====\n", alternate);
return real_usb_set_altinterface(dev, alternate);
}
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